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Bunn H10X - page 1
OPERA TING & SERVICE MANUAL BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 www .bunn.com H10X WARNING Ve ry Hot Water Use With Care! ! 10889.0000E 02/08 ©1995 Bunn-O-Matic Corporation T o ensure you have the latest revision of the manual or to obtain the illustrated p ...
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Bunn H10X - page 2
2 10889 020608 BUNN-O-MA TIC COMMERCIAL PRODUCT W ARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specified below: 2 years parts and 1 year labor . 2) Electronic circuit and/or control boards: parts and labor for 3 years. 3) Compressors on refrigeration equipment: 5 years par ...
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Bunn H10X - page 3
3 USER NOTICES Carefully read and follow all notices on the equipment and in this manual. They were written for your protec- tion. All notices are to be kept in good condition. Replace any unreadable or damaged labels. 12537.0000 10889 021408 12593.0000 00831.0000 37881.0000 00656.0000 This equipment must be installed to comply with the Internation ...
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Bunn H10X - page 4
4 ELECTRICAL REQUIREMENTS CAUTION - The dispenser must be disconnected from the power source until specified in Initial Set-Up. This dispenser requires 2-wire, grounded service rated 208 or 240 volts ac, 40 amp, single phase. (Refer to the dispenser’ s dataplate for exact voltage requirement.) Electrical Hook-Up CAUTION – Improper electrical i ...
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Bunn H10X - page 5
5 INITIAL SET -UP CAUTION - The dispenser must be disconnected from the power source throughout the initial set-up, except when specified in the instructions. 1. Connect the dispenser to the power source and turn on the water supply . 2. The “HEA TER” LED will glow for approximately five seconds. During this time, the electronic circuitry wil ...
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Bunn H10X - page 6
6 TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic T echnical Service Department. • Inspection, testing, and repair of electrical equipment should be performed only by qua ...
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Bunn H10X - page 7
7 TROUBLESHOOTING (cont.) PROBLEM Automa tic refil l will not ope rate afte r drawing hot water . Water flows into the tank continu- ou sl y . (D ispe nser disc onne ct ed fr om power source). Water flows into the tank con - tinuously (Dispenser connected to power source). Water is cold. PROBABLE CAUSE 1. No water 2. Water strainer/flow control ...
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Bunn H10X - page 8
8 TROUBLESHOOTING (cont.) PROBLEM Water is cold (cont.) Water boils continuously . PROBABLE CAUSE 3. T ank heater 4. T emperature control 5. Dry plug protection 1. T emperature control 2. Lime build-up REMEDY Refer to Ser vice - T ank heater for testing procedures. See page 19. Refer to Ser vice - Electronic con - trols for testing procedures. See ...
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Bunn H10X - page 9
9 SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should ser vice become necessary . Refer to T roubleshooting for assistance in determining the cause of any problem. Component Access WARNING - Disconnect the dispenser from the power source before the removal of any panel or the rep ...
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Bunn H10X - page 10
10 SERVICE (cont.) Electronic Control Assembly T roubleshooting: Check these items first • Is circuit board popped out of bracket? • Is cir cuit board wet due to misaligned overow tube? • Is water in overow cup activating oat switch? • Is overow cup not making good contact with tank? • Is dispenser being operated with panels ...
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Bunn H10X - page 11
11 SERVICE (cont.) Electronic Controls (cont.) Liquid Level Control T est Procedure 1. Disconnect the dispenser from the power source. 2. Check the voltage across terminals 3 & 4 of the electronic control assembly with a voltmeter . Connect the dispenser to the power source. The indication must be 200 to 240 volts ac for 200 to 240 volt models. ...
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Bunn H10X - page 12
12 SERVICE (cont.) Electronic Controls (cont.) T emperature Control Flow Charts (cont.) T emperature Control T est Procedure 1. Disconnect the dispenser from the power source. 2. Check the voltage across terminals 3 & 4 of the electronic control circuit board with a voltmeter . Connect the dispenser to the power source. The indication must be 2 ...
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Bunn H10X - page 13
13 SERVICE (cont.) Electronic Controls (cont.) 11. Disconnect the dispenser from the power source. If vol tag e was pres en t as des cri bed, retu rn the new tri ac assembly to Bunn-O-Matic for credit. The temperature control of the system is operating properly . If voltage was not present as described, reinstall your existing electronic control as ...
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Bunn H10X - page 14
14 T riac Assembly Removal and Replacement NOTE - Each triac installation requires the use of an approved silicone heat sink compound. Bunn-O-Matic recommends the use of Dow Corning 340 compound or equivalent. It can be purchased direct from Bunn- O-Matic (P .N. M2522.1000) 1. Remove the existing triac assembly held in place with a 10-32 hex keps n ...
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Bunn H10X - page 15
15 SERVICE (cont.) Limit Thermostat P1993 FIG. 5 LIMIT THERMOST A T T est Procedure: 1. Disconnect the dispenser from the power source. 2. There are two black wires on the limit thermostat terminals. One comes from the terminal block. The other goes directly to the tank heater terminal. Re- move the black wire at the limit thermostat coming from th ...
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Bunn H10X - page 16
16 Location: Th e ove rfl ow pr ote ctio n swi tc h is loc at ed with in the sid e of the dispenser inside the copper overflow cup. For testing or removal of the over flow protection switch, access may also be needed by removing the two screws attaching the electronic control assembly to its mounting bracket. T est Procedure: 1. Once voltage is v ...
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Bunn H10X - page 17
17 Solenoid Valve Location: The solenoid valve is located within the side of the dispenser on the right side near the bottom. T o test the solenoid valve, access will also be needed to the electronic control assembly . HAZARDOU S VO LT AGE DI S CONNECT FRO M POWER S OU RC E BE FO R E RE MO VI NG ! WAR NI NG P1994 FIG. 9 SOLENOID V AL VE SERVICE (co ...
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Bunn H10X - page 18
18 WHI/BLU to Electronic Contol #1 RED to T erminal Block RED to Electronic Control #5 P1779 FIG. 10 SOLENOID V AL VE WIRING 5. Lift out the solenoid valve. 6. Rem ove the two 10- 32 slo tt ed -he ad scr ew s hold ing the solenoid valve to its mounting bracket. 7. Sec urely in sta ll the new sole no id val ve to its mou nt- ing bracket. The directi ...
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Bunn H10X - page 19
19 SERVICE (cont.) T ank Heater Location: The tank heater is located in the tank lid. P1993 FIG. 11 T ANK HEA TER T est Procedure: 1. Disconnect the dispenser from the power source. 2. Check the voltage across the terminals of the tank heater with a voltmeter . Connect the dispenser to the power source. The indication must be 200 to 240 volts ac fo ...
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Bunn H10X - page 20
20 GRN/YEL BLK RED BLU WHI/VIO BLK TRIAC TA NK HEA TER BLK RED BLU 200-240 VOL TS AC 2 WIRE + GND SINGLE PHASE 10888.0000C 01/07 © 1989 BUNN-O-MA TIC CORPORA TION SOL SCHEMA TIC WIRING DIAGRAM H10XA GRN/YEL REFILL PROBE PNK- 20 ELECTRONIC CONTROL ASSY TA N RED WHI/BLU BLK OVERFLOW PROTECTION SWITCH BLU 6 3 1 5 4 8 7 2 9 TA N HEA TER REFILL WHI/VIO ...
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